untreated
adjective
un·treat·ed
ˌən-ˈtrē-təd 
: not treated
untreated wastewater
especially
: not improved or controlled medically
an untreated case of pneumonia
untreated diabetic patients
Examples of untreated in a Sentence
untreated wool
Recent Examples on the Web
Wood Surfaces Steel wool can damage wood surfaces, especially if the wood is soft or untreated.
—
Maria Sabella, Better Homes & Gardens, 19 June 2025
Silverplate can, however, be permanently tarnished if untreated.
—Daley Quinn, Southern Living, 18 June 2025
The standard is to protect infants under 6 months, who can become seriously ill and die if untreated, if exposed to high levels of nitrate, according to the EPA.
—Julia Jacobo, ABC News, 16 June 2025
During last year’s salmonella outbreak, the farm defended its untreated canal water, saying that it was used for underground irrigation and not applied to the edible parts of the plant.
—Suzy Khimm, NBC news, 7 June 2025
See All Example Sentences for untreated
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Maria Sabella, Better Homes & Gardens, 19 June 2025
Silverplate can, however, be permanently tarnished if untreated.
—Daley Quinn, Southern Living, 18 June 2025
The standard is to protect infants under 6 months, who can become seriously ill and die if untreated, if exposed to high levels of nitrate, according to the EPA.
—Julia Jacobo, ABC News, 16 June 2025
During last year’s salmonella outbreak, the farm defended its untreated canal water, saying that it was used for underground irrigation and not applied to the edible parts of the plant.
—Suzy Khimm, NBC news, 7 June 2025
See All Example Sentences for untreated
Cite this Entry
“Untreated.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/untreated. Accessed 4 Jul. 2025.
Copy CitationMedical Definition
untreated
adjective
un·treat·ed
-ˈtrēt-əd
: not subjected to treatment
an untreated disease
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